Efficient revocable attribute encryption scheme in task matching system
Aiming at the problems of security,privacy and cost in data processing in traditional task matching sys-tem,an efficient revocable outsourcing ciphertext policy attribute encryption scheme is proposed,which is suitable for system with limited resources.The traditional encryption is divided into two parts:the user offline phase and the online encryption phase,and the ciphertext is outsourced to the cloud server and connected with the block chain to reduce the user computing cost.Then,the chameleon hash function is used to update the user private key for attrib-ute revocation and user revocation.Finally,experiments show that,compared with the existing revocable attribute en-cryption schemes,this scheme can resist key disclosure and collusion attacks,and has lower time overhead.
chameleon hash functionoutsourcing decryptionrevocable attribute encryptiontask matching system
万方数据
维普
